Defensive publication

ABSTRACT

METALLIC COLOR PRODUCING CONTAMINANTS PRESENT IN BIS(BETA-HYDROXYETHYL) TEREPHTHALATE IN SOLUTION IN ETHYLENE GLYCOL MAY BE REMOVED FROM THE MONOMER BY CONTACTING THE SOLUTION AT TEMPERATURES ABOVE ABOUT 140* C. WITH ADSORBENTS TYPIFIED BY SILICA ALUMINA, ACTIVATED ALUMINA, ALUMINUM SILICATE (AL2(SIO3)3) ALUMINA (AL2O3) OR ACTIVATED CARBON, AND THEREAFTER FILTERING THE SOLUTION TO REMOVE THE ADSORBING AGENT OR AGENTS AND THE ADSORBED METAL CONTAMINANTS.

UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the publicfor inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter;

PUBLISHED JULY 18, 1972 PROCESS FOR REMOVING METALLIC COLOR PRODUCING CONTAMINANTS FROM SOLU- TIONS 0F BlS(BETA-HYDROXYETHYL) TER- EPHTHALATE IN ETHYLENE GLYCOL Thomas G. Davis, 1542 Waverly Road 37664; David L. Nealy, 908 Afton St. 37660; and Jefferson W. Reynolds, 2121 E. Sevier St. 37664, all at Kingsport,

Tenn.

Filed Nov. 2, 1971, Ser. No. 194,914 Int. Cl. C07c 69/82 US. Cl. 260475 PR No Drawing. 8 Pages Specification Metallic color producing contaminants present in bis- (beta-hydroxyethyl) terephthalate in solution in ethylene glycol may be removed from the monomer by contacting the solution at temperatures above about 140 C. with adsorbents typified by silica alumina, activated alumina, aluminum silicate [A1 (SiO alumina (A1 0 or activated carbon, and thereafter filtering the solution to remove the adsorbing agent or agents and the adsorbed metal contaminants. 

